This could actually intimidate his opponents. They are going to be careful of any contact with open cuts on his face or elsewhere. That blood could very well be the carrier of a fatal disease. You can’t avoid getting some of his blood on your own boxing glove and you can’t avoid using your own boxing glove to protect your own face.

Draw two circles like a Venn Diagram. Yes, they overlap but not by much. In one, you can put "gay people" and the other you can put "people with HIV". At this stage this is a fair representation. Back when the epidemic started, yes, the majority of the patients were gay but that's no longer the case. (And even if it were, why presume that every gay person had the disease?)

Even if our local lad Luke Campbell was gay (he's not, BTW), it wouldn't concern me one jot; if any of his opponents in the 2012 London Olympics were gay, did he care? No. He still brought Olympic Boxing Gold back to Hull: (on the balcony of Hull City Hall):